Crusher



| P. GREEN Sept. 11, 1934.

CRUSHER Original Filed July 22, 1929 5 sheets sheet :5

all vI I Patented Sept. 11, 1934 Ubiiifil'i STATES CRUSHER Leslie P. Green, Chicago, 111.

Application July 22, 1929, Serial No. 380,177 Renewed February 1, 1934 4 Claims.

The invention relates to improvements in crusher-s especially adapted for crushing rock or/and the like, the primary object of the invention being to provide an improved construction of this character which is highly efficient in use.

Another object of the invention is the provision of an improved construction of the character indicated having capacity for crushing the maximum amount of material within the minimum amount of space occupied.

Another object of the invention is the provision of improved construction of the character indicated, so constructed and arranged as to produce a rolling action on the particles being crushed, thereby greatly facilitating the crushing action.

Other objects will appear hereinafter.

The invention will be best understood by reference to the accompanying drawings forming part of this specification and in which- Fig. l is a vertical transverse section of a crusher embodying the invention;

Fig. 2, a partial section taken substantially on line 2-2 of Fig. 1;

Fig. 3, a partial section taken substantially on line 33 of Fig. 1;

Fig. 4, a perspective view of one of the crusher jaws employed inthe crusher;

Fig. 5, a perspective view of the other crusher jaw employed in the crusher;

Fig. 6, a perspective view of a modified form of crusher jaw;

Fig. 7, a perspective view of the crusher jaw cooperating with the one illustrated in Fig. 6;

Fig. 8, a perspective view of another modified form of crusher jaw;

Fig. 9, a perspective view of the crusher jaw cooperating with the one illustrated in Fig. 8;

Fig. 10, a vertical transverse section of two other modified forms of crushing jaws taken substantially on line 10-40 of Fig. 11;

Fig. 11, a top plan view corresponding with Fig. 10;

Fig. 12, a side view of two other modified forms of crushing jaws; and

Fig. 13, a top plan View corresponding with Fig. 12.

The embodiment of the invention illustrated in Figs. 1 to 5, inclusive, comprises a suitable frame 20 having a suitable base or abutment 21 therein. Cooperating with the abutment 21 is the usual crusher head 22 mounted on an eccentric 23 on an operating shaft 24 carrying the usual fly wheel 25. Cooperating with the crusher head 22 is the usual toggle plate 26 arranged to fit either of the usual sockets 27in the usual wedge bearing 28 resting on the usual wedge a member 29 operable by the usual adjusting screw 30 on the usual abutment member 2l'-of the frame 20. The usual tension rod 31 is connected with the lower end of the crusher head 22 and is operated by the usual compression spring 33 for performing the usual inoperative or receding stroke or motion of the crusher head 22. The construction and arrangement already described is an old and well known crusher construction operating to cause the crusher head 22 to approach and recede from the abutment 21, as will be readily understood by those skilled in this art.

Cooperating crusher jawsSB and 34 are detachably mounted, respectively, as shown, on the abutment 21 and the crusher head 22. These crusher jaws are provided with downwardly converging crushing surfaces 35 and 36, as shown.

As best shown in Figs. 4 and 5, the crusher jaws 33 and 34 are provided in their lower portions with outwardly extending angular recesses 37 and 38, said recesses forming interfitting projections 39 and 40, the projections on one jaw being arranged, as shown, to fit into recesses on the other, thereby forming angular tortuous passageways for the particles being'crushed. The arrangement is such as to cause the cooperating crushing surfaces thus formed to approach each other gradually from top to bottom, except at their extreme lower ends, where they are extended vertically to form a narrow, vertical, tortuous escape orifice 41. In use, the material to be crushed is inserted in the usual way between the upper portions of the crushing surfaces 35 and 36. As this material is reduced in size by the usual and normal action of the crushing jaws, as they ap-' proach and recede from each other during the" normal operation of the crusher head 22, they pass downwardly into the tortuous, angular, smaller passageways formed by the recesses-3'7 and 38 and the cooperating projections 39 and 40. The arrangement is such that, owing to the angular relation of the crushing surfaces in these tortuous passageways, there is relative lateral movement betweenthe crushing surfaces'as they approach and recede from each other, such relative lateral movement causing rolling of the par- J ticles being crushed on said tortuous crushing 105 surraces, thereby facilitating the splitting and crushing of said particles. It is also to be noted that the sides of the said recesses and projections are so opposed to each other that their reactions during the crushing actions oppose 110 and balance each other, thereby relieving the operating parts of the crusher from corresponding strains.

Obviously, the angular tortuous arrangement of the crushing surfaces provides an extended escape orifice and thereby renders the crusher capable of increased output. As will be noted from Fig. 2, the extent of the opposed angular surfaces is materially greater than the distance between them. Obviously, the distance between them determines the size of the maximum particles being crushed, so that this arrangement produces cooperating surfaces materially greater than the thicknesses of the maximum particles operated upon, thereby causing rolling of said particles in the crushing action.

It is also to be noted that the top walls of the recesses 37 and 38 are outwardly and downwardly inclined or undercut with reference to the body of the crusher jaws and that the top surfaces of the projections 39 and 40 constitute continuations of the crushing surfaces 35 and 36. By this arrangement, when the stone has been crushed sufficiently to pass beyond the crushing range of the upper crushing surfaces, the course of the crushed stone is changed and the same caused to pass outwardly and downwardly through downwardly diverging passage-ways arranged in tortuous'relation so that the eifective crushing area is thereby materially increased to accommodate the constantly increasing number of stone particles to be crushed, and to increase the uniformity of the product. It is also to be noted that the reactions produced by the crushing strains of the upper and lower crushing surfaces are opposed to each other to considerable extent and thereby balance eachother to that extent, thus relieving the supporting and operating mechanism from that much of the crushing strains.

In Figs. 6 and 7, I have illustrated modified forms of crushing jaws 42 and 43 in which but a single recess and projection are employed. The crushing surfaces of the jaws 42 and 43 are provided, respectively, with vertically extending corrugations or roughening ribs 45 which tend to prevent slippage of the particles being crushed and thereby facilitate the crushing action.

In 8 and 9, I have illustrated still another modification of crushing jaws. Here the crushing jaws 46 and 47 have the cooperating projections and recesses extending nearly to the tops thereof and slightly curved on the sides and tops, as shown. Otherwise, the construction is the same as that illustrated in Figs. 6 and 7.

In Figs. 10 and 11, I have illustrated still anothermodified' form of crushing jaws. Here the crushing jaws 48 and 49 are provided with the recesses and projections extending from their upper edges continuously downwardly to the upper edges of the escape orifice 41.

In Figs. 12 and 13, I have illustrated still another modified form and arrangement of crushing jaws. Here the crushing jaws 50 and 51 are provided with straight or non-tortuous crushing sur: faces converging downwardly and arranged at a transverse angle to each other. This arrangement, while not tortuous, has the effect of producing rolling action between the articles being crushed and also materially increases the length of the escape orifice 41, thereby increasing the crushing capacity of the jaws.

While I have illustrated and described the preferred forms of construction for carrying my invention into effect, these are capable of modification and variation without departing from the spirit of the invention. I therefore do not wish to be limited to the precise details disclosed but desire to avail myself of such variations and modification as fall within the scope of the appended claims. Y

I claim:

1. A crusher comprising two co-operating crushing jaws and means for causing said jaws to approach and recede from each other, said crushing jaws being Provided with downwardly converging surfaces, the lower portions of each of said being provided with under-cut recesses forming intermediate projections fitting into the recesses on the other co-operating jaw, the tops of said projections and the tops of the recesses converging downwardly toward each other.

2. A crusher comprising two co-operating crushing jaws and means for causing said jaws to approach and recede from each other, said crushing jaws being provided with downwardly converging similarly inclined crushing surfaces, the lower portions of each of said jaws being provided with under-cut recesses forming intermediate projections fitting into the recesses on the other co-operating jaw, the tops of said projec tions and the tops of the recesses converging downwardly toward each other.

3. A crusher comprising two co-operating crushing jaws and means for causing said jaws to approach and recede from each other, said crushing jaws being provided with downwardly converging surfaces, the lower portions of each of said jaws being provided with under-cut recesses forming intermediate projections fitting intothe recesses on the other co-operating jaw, the tops of said projections constituting substantial continuations of the upper surfaces and the tops of the recesses being arranged at obtuse angles to the upper crushing surfaces of the respective jaws and converging downwardly toward the tops of the projections on the co-operating jaw.

l. A crusher comprising two co-operating crushing jaws and means for causing saidjaws to approach and recede from each other, said crushing jaws being provided with downwardly converging similarly inclined crushing surfaces, the lower portions of each of said jaws being provided with under-cut recesses forming intermediate projections fitting into'the recesses on the other co-operating jaw, the tops of said projections constituting substantial continuations of the upper surfaces of the respective jaws and the tops of the recesses being arranged at obtuse angles to the uppercrushing surfaces of the respective jaws and converging downwardly toward the tops of the projections on the cc-operating jaw.

LESLIE P. GREEN 

